Update ease to 0.1.3

requirements/edx/github.txt

@@ -39,7 +39,7 @@ git+https://github.com/hmarr/django-debug-toolbar-mongo.git@b0686a76f1ce3532088c
 -e git+https://github.com/edx/edx-ora2.git@release-2015-05-08T16.15#egg=edx-ora2
 -e git+https://github.com/edx/edx-submissions.git@e2361932b9bce061a018a31bb3929e9cade80f49#egg=edx-submissions
 -e git+https://github.com/edx/opaque-keys.git@1254ed4d615a428591850656f39f26509b86d30a#egg=opaque-keys
--e git+https://github.com/edx/ease.git@c6dee053eae6b3ac4fdf6be11fa7a9f8265540aa#egg=ease
+-e git+https://github.com/edx/ease.git@b67d2928a26fe497826b6ea359b9a3d0371548a7#egg=ease==0.1.3
 -e git+https://github.com/edx/i18n-tools.git@7b89d5e01c1a7cc5d69d813bd8c6b706a8f75119#egg=i18n-tools
 -e git+https://github.com/edx/edx-oauth2-provider.git@0.5.1#egg=oauth2-provider
 -e git+https://github.com/edx/edx-val.git@d6087908aa3dd05ceaa7f56a21284f86c53cb3f0#egg=edx-val